Kevco pickup tube bracket - attachment

Just got our Kevco M-301 pan and matching pickup...nice pieces.

The support bracket on the pickup is a problem. Our 340 mains have studs with tall nuts instead of stock type bolts. The ends of the studs have a hex shaped hole for turning into the block during assembly.

There isn't enough thread exposed above the nut to use another nut on top of the bracket.

Have any of you had this situation and if so, what was your solution? Perhaps a small stud welded to the main stud for securing the pickup bracket?